Drill



April 29, 1930. w. w LANDRUM 6, 89

DRILL Filed July 27, 1929 gwue'ni ot MMW Patented Apr. 29, 193i) STATE12% WILLIAM W. LANDRUM, OF LEAGUE CITY,

TEXAS, Assrenon or own-1min 'r'o H. e.

MOBLEY, OF HOUSTON, TEXAS V 1' DRILL Application filed July 27,

This invention relates to new and useful improvements in a drill.

One object of the invention is to provide a drill of the characterdescribed preferably of the fish tail type provided with novel means forflushingthe sides of the drill to prevent the earth formation fromadhering thereto.

Another object of the invention isto provide a drill of the characterdescribed which 10 is so constructed that it will be very strong anddurable and not liable to be broken under the stress of the work, andwhich is characterized by the provision of water channels whichterminate, near the lower end of the bit in transverse upwardly directednozzles through which the drilling fluid will be dis charged and spreadover the sides of the drill washing away the formation that may adhereto the drill preventing, or minimizing, the adherence of such formationto the drill.

With the above and other objects in view this invention has particularrelation to certain novel features of construction, operation andarrangement of parts an example of which is given in this specificationand illustrated in the accompanying drawings, where- Figure 1 shows aside view of the drill.

Figure 2 shows a cross sectional view taken onthe line 2-2 of Figure 1,and v Figure 3 shows a vertical sectional view taken on the line 33 ofFigure 1.

Referring now more particularly to the drawings, the numeral 1designates the body of the drill whose upper end terminates in anoutwardly threaded shank 2 to receive .the drill collar by means ofwhichthe drill is attached to the conventional drill stem.

The body 1 is blade-like in form and its lower end terminates in theoppositely curved cutting edges 3, 3. 7

On each side of the body there is a vertical rib 4 Whose lower end 5 isturned outwardly across said body. Said outwardly turned lower endsextend in opposite directions and terminate at the respective edges ofsaid body.

There are the Water channels 6, (iwhich eX- tend from the upper endofthe drill downwardly through ribs 4, 4t and outwardly through theoutwardly turned ends 5 there 1929. Serial No. 381,546.

of. The outer ends of these channels are closed and said channels havethe oblong nozzle openings 7 7 which are directed upwardly and arearranged adjacent the respective side faces of the bit body. Thedrilling'fiuid will be forced down through the channels 6 and dischargedupwardly through the nozzles 7, 7 over that portion of the drill above.Above the respective nozzles 7, 7, the drill is provided with one, ormore, openings 8 through which the cuttings may pass, as the bitrotates, thus lessening the resistance encountered, in assisting inmixing the formation with the drilling fluid so that said mixture may bemore easily Washed out. A portion of the fluid from the upwardlydirected'nozzles, also, will pass through the lower openings 8 so thatwater will be supplied to both sides of the drill all the way across.

A preferred form of the invention has been 7 disclosed in thespecifications and drawings, by way of illustration only while the broadprinciple of the invention will be defined by the appended claims.

What I claim is:

1. A drill having water channels leading downwardly therethrough fromits upper end and turned laterally across the opposite sides of thedrill and terminating in transverse upwardly directed discharge nozzles.

2. A drill having a fiat body whose lower ends terminate in cuttingedges, said drill having fluid channels leading downwardly from theupper end thereof the lower ends of said channels being turnedtransversely across the body and having elongated, up-- wardly directed,nozzle openings- 3. A drill having water channels leading downwardlytherethrough from its upper end and turned laterally across the oppositesides of the drill and terminating in transverse upwardly directeddischarge nozzles, said drill having transverse openings therethrough onV opposite sides of'the axis of the drill.

l. Adrill having a flat body, a rib on each side of said body leadingfrom the upper end thereof, the lower end of each rib being turnedlaterally, said laterally turned ends extending in opposite directions,each rib having a water channel therethrough the lat- 1 i erally turnedends of said channels terminat- 'ing in upwardly directed nozzles.

5. A drill having a. flat body, a rib on each side of said body leadingfrom the upper end thereof, the lower end of each rib being turnedlaterally, said laterally turned ends extend-.

ing in opposite directions, each rib havinga Water channel therethroughthe laterally turned ends of said channels terminating in upwardlydirectednozzles, said body having transverse openings therethrough on0pposite sides of the axisof the drill. f r

In testimony whereof I have signed my name to this specification.

VILLIAM V. LANDRUM.-

